Document envelope



2 Sheets-Sheet 1.

(Model.)

EQJ. TRUM. DOCUMENT ENVELOPE.

Patented Sept. 14, 1886.

2 Sheets-sheet 2.

(Model.)

B. J TRUM. DOCUMENT ENVELOPE.

No. 349,188. Patented Sept; 14, 1886.

Invenibr: W

- y/Zwr/wy N. PETERS, Photu-Lflhagnphnr, Wanhingwn. D C.

UNITED. STATES PATENT OFFICE.

EMANUEL J. TRUM, on BROOKLYN, NEW YORK.

DOCUMENT-ENVELOPE.

SPECIFICATION forming part of Letters Patent No. 349,188, datedSeptember 14, 1886.

' Application iiled May 23, 1884. Serial No. 132,511. (Model) A To allwhom it may concern:

Be it known that I, EMANUEL J. TRU n, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented anew and useful Document-Envelope, of which the following is aspecification.

My invention relates to expansible document-envelopes, files, andsimilar articles, and to a blank formed from a single piece of paper orother suitable material.

In the accompanying drawings, Figure 1 represents a perspective view ofmy improved document-envelope. Fig. 2 represents a letter or invoicefile constructed on the same principle. Fig. 3 represents the partitionof the file by which the pockets are formed. Fig. 4 represents the blankfrom which the envelope or file is made. Fig. 5 illustrates the mannerof forming the envelope, file, 850., from the blank.

Referring to the drawings, A represents the flap of the envelope; B B,the sides; 0, the gusseted bottom, and D D the gusseted ends. The sidesB B are bent up at right angles to the bottom 0, and the bottom beingbent or foldedinward at its middle longitudinal line a gusset is therebyformed. WVhen the sides are bent up, the two parts a a, the latter ofwhich is narrower than the former to the extent of the width of one foldof the gusset, are.

pasted together, and thus form the ends of the envelope. Between the endgussets, D, and the bottom gussets, C, an opening is left when the endsare pasted together,and this opening is closed up by a piece of cloth orother suitable material, E, of aright-angular form, which is placed overthe opening from the inside and pasted to the adjacent surfaces of theends, bottom, and sides. The part of the cloth which covers the openingis shown by the solid lines in Fig. 1, and the part which is pasted tothe sides, bottom, and ends is indicated by the dotted lines, Figs. 1and 2. The

cloth piece is arranged to fold evenly with the end and bottom to formcorner gussets.

To close the openings which are formed between the ends I) D and theflap A when the ends are expanded to their fullest width, the widerpart, a, of the gusseted end is extended above the sides, so as to forma flap, F,which-,

when the flap A is closed, folds down under the flap.

The blank from which the sides, bottom, and ends of the envelope aremade is shown in Fig. 4. A'rectangular sheet of paper or other suitablematerial, the outlines of which are indicated by dotted lines, is cut bya suitable die so as to form the flap A, sides B B, gusset-bottom O, andgusset end parts, a a. The dotted lines 00 indicate the outlines of thesides, and outside of these dotted lines are the end pieces, a a, and atthe middle of the blank between the lines a: x of the sides 13 B is thebottom piece, 0. On each side the material is cut out so that theadjacent edges of the end pieces and the bottom piece are formed intoV-shaped points, and from the angles of these points indentations y aremade in lines parallel to the lines .90 m, which indentations form thefolding-linesof the gnssets which compose theends and bottom. The partsa of the ends, it will be observed, are one fold narrower than the partsa, so that when the two parts are brought together-the fold 1 of a liesagainst and is pasted to the fold 2 of a.

If the envelope is to be unprovided with closing pieces or flaps F, theend pieces, a a, are of the same lengthth at is, their top edgescorrespond to the edges of the sides B B; but if the flap F is to bemade on the envelope the end pieces a, which are on the flap side of theenvelope, are made longer, so as to form the flap'pieces F, which areout or separated from the flap A, it of rectangular form, as

shown on one side of Figs. 1 and 4; but ifmade of triangular form, asshown on the opposite side of the said figures, the flap is notseparated from flap A, but is folded so as to turn inward and downwardwhen the envelope is closed.

, In making the envelope, a block, H, is used as a form over which theblank is laid and pasted together. This block has the same length andwidth as the envelope is intended to have when expanded to its greatestextent. The first step in the process of manufacture after cutting outthe blank is to lay the cloth piece E over the corners of the block.Then the blank, after the glue is laid on the fold 1 of the ends, and onthat portion of the ends'and bottom to which the cloth is to be secured,is

placed on the block, the sides are bent up against the sides of theblock, and the ends of the bottom part, 0, are caused to adhere to thecloth pieces E. The parts a a are then folded down and pasted togetherand to E. The block is now removed and the ends and bottom are folded onthe indented lines y, alternately in and out, (if there is more than onegusset,) to form the gussets, whereupon the envelope is completed. Bymaking the corners of cloth or muslin any thickness of paper or othermaterial can be used for the body of the envelope without interferingwith the contraction and expansion of the envelope. 4

If a letter or invoice file is wanted containing pockets, partitions areplaced in the envelope in the grooves formed by the outwardlyprojeetingfolds of the gussets. Fig. 2 illustrates such a file, and Fig. 3 showsone of the partitions. The partitions are to be placed in the envelopeso as to strengthen the gusseted ends and bottom. The partitions areindicated by I. They are made just long enough to slip in the grooves ofthe end gussets and extend from the bottom of the envelope to the topthereof. On the ends and bottom are projections or lips e, which areintended to be bent up at acute angles and rest against the sides of theend and bottom gussets, to which they are pasted. These leaves orpartitions thus connect the ends of the envelope together, and therebyprevent the ends from bulging, and also fasten the bottom, so that itwill not sag under the weight of the papers placed in the file.

From the same form of blank herein shown and described oblong envelopesand files can be made. The gusseted ends can be formed entirely on oneside, if desired-that is to say, the piece a can be made sufficientlylong to paste directly to the side B, and the part a may be omitted.

I claim- 1. An expansible envelope made with its sides and bottomcontinuous, the ends in two parts, which are continuous with theirrespective sides, the said parts being pasted together and the ends andbottom connected together by separate pieces, substantially asspecified.

2. In an expansible envelope or file, the combination of the sides B Band bottom (f. formed of one continuous piece, the ends D. composed oftwo parts which project from the sides B B, and are pasted together, thesaid two parts being of unequal width, and pieces connecting the bottomand ends and closing the openings between the same, substantially asspecified.

3. A blank for expansible envelopes, files, &c.,consisting of the sidesB B, having, respectively, extensions or projections aa aa. to form theends D D, the part 0, connecting the sides B B, and the V-shapedprojections on the contiguous edges of the parts 0 a a a a, for thepurpose substantially as specified.

EMANUEL J. TRUM.

\Vitnesses:

LEOPOLD SELDNER, lsAAo SELDNER.

